Crosby is out with a concussion; no timetable for his return.It has been a while since we’ve seen Crosby and concussion in the same sentence, but on Friday, Crosby’s old demons returned as he suffered a concussion in practice. It is normal to not have a definitive timetable when someone has a concussion, but it’s even more difficult when someone has had multiple concussions before. The Penguins will take every precaution with their captain, which obviously clouds his availability for the season opener.